sensorfwmagnetometer.cpp

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "sensorfwmagnetometer.h"


char const * const SensorfwMagnetometer::id("sensorfw.magnetometer");
const float SensorfwMagnetometer::NANO = 0.000000001;


SensorfwMagnetometer::SensorfwMagnetometer(QSensor *sensor)
    : SensorfwSensorBase(sensor)
    , m_initDone(false)
{
    init();
    setDescription(QLatin1String("magnetic flux density in teslas (T)"));
    setRanges(NANO);
    setReading<QMagnetometerReading>(&m_reading);
    sensor->setDataRate(50);//set a default rate
}

void SensorfwMagnetometer::start()
{
    if (reinitIsNeeded)
        init();
    QMagnetometer *const magnetometer = qobject_cast<QMagnetometer *>(sensor());
    if (magnetometer)
        m_isGeoMagnetometer = magnetometer->returnGeoValues();
    SensorfwSensorBase::start();
}

void SensorfwMagnetometer::slotDataAvailable(const MagneticField& data)
{
    //nanoTeslas given, divide with 10^9 to get Teslas
    m_reading.setX( NANO * (m_isGeoMagnetometer?data.x():data.rx()));
    m_reading.setY( NANO * (m_isGeoMagnetometer?data.y():data.ry()));
    m_reading.setZ( NANO * (m_isGeoMagnetometer?data.z():data.rz()));
    m_reading.setCalibrationLevel(m_isGeoMagnetometer?((float) data.level()) / 3.0 :1);
    m_reading.setTimestamp(data.timestamp());
    newReadingAvailable();
}

void SensorfwMagnetometer::slotFrameAvailable(const QList<MagneticField> &frame)
{
    for (int i=0, l=frame.size(); i<l; i++) {
        slotDataAvailable(frame.at(i));
    }
}

bool SensorfwMagnetometer::doConnect()
{
    Q_ASSERT(m_sensorInterface);
    if (m_bufferSize==1)
        return QObject::connect(m_sensorInterface, SIGNAL(dataAvailable(MagneticField)),
                                this, SLOT(slotDataAvailable(MagneticField)));
    return QObject::connect(m_sensorInterface, SIGNAL(frameAvailable(QList<MagneticField>)), this,
                            SLOT(slotFrameAvailable(QList<MagneticField>)));
}

QString SensorfwMagnetometer::sensorName() const
{
    return "magnetometersensor";
}

qreal SensorfwMagnetometer::correctionFactor() const
{
    return SensorfwMagnetometer::NANO;
}

void SensorfwMagnetometer::init()
{
    m_initDone = false;
    initSensor<MagnetometerSensorChannelInterface>(m_initDone);
}